How does the size of the sun compare to the size of the earth?

The sun is 695,500 km in radius, while the earth's radius is only 6378 km.

This means that if the sun was about as tall as a regular desk, the earth would be the size of a small paperclip. You could fit about 1,000,000 whole earths inside of the sun, (slightly more or less depending on how you arranged them). The sun is also very dense, and weighs 332,900 times as much as the earth.

In the related links section, you can find a to-scale picture of the sun next to the earth.